A Californian named Tristan Anderson was hit in the head today by a tear gas canister fired by Israeli troops during a protest in the West Bank. "He had a large hole in the front of his head, and his brain was visible," said demonstrator Ulrika Jenson, who witnessed the incident. Anderson is hospitalized near Tel Aviv and in stable but critical condition. Anderson, an activist from Oakland, was with the International Solidarity Movement protesting an Israeli separation barrier in the West Bank village of Maasarah, near Bethlehem. Israel says the barrier is necessary for security, but Palestinians call it an excuse to claim more land. There were, depending on whom you ask, between 200 and 400 protesters, but nearly all dispersed after Anderson was wounded.